What would you think

So my boyfriend is 12 years older than me. He's been married before, their relationship lasted 8 years and were married for like 3 of those 8 years. She cheated on him and left him, and he took it very very roughly. That was almost 4 years ago when she left him and they got divorced. So clearly it's been some time, and he's a lot better. Her family still lives 2 minutes away from my boyfriends house and he's still kind of close with them. He'll ride motorcycles with her step dad once in a while. And he was over at her parents house fixing their heat on Sunday. She doesn't live there she levies with her new bf but she showed up, they supposedly fought, about everything in the past, and then he left. I was kind of pissed because he didn't tell me he was going over go her parents house to fix their heat. He had me take his son food shopping with me and when I came back he was gone and wouldn't answer me for an hour and a half. Then he finally came home and he told me he finally closed a chapter in his life. Which I thought was already closed as they've been divorced for 3 years...but he said it's completely over. But I had a feeling the next day when he went to work he was going to text her about their encounter the previous day so last night I asked him and he said yeah I just messaged her basically saying everything we needed to say and both agreed it's done and wished her the best etc. I asked him if I could read it and of course he deleted it. I know for a fact he said thighs to her like "I'll always love you" and who knows what else. He keeps ensuring me it's completely done he could never trust her she's not the same person he was with years ago. And he admitted that she will always have a place in his heart cause she was a part of his life and he will always love and care about her. And I kind of understand that but I feel like he needs to get over it. She is a beautiful girl and from what I've heard she's a lot like me personality wise, good girls at heart which is not like the rest of the girls he's dated. I saw he texts her mom saying I wish I can do something to help her. I just want him to be done with it and I would really love it if he didn't go over he parents house anymore. I've always been uncomfortable with it A) because I feel like that's his way of staying connected to her by having a relationship with her family and B) I knew he was going to eventually run into her there. I'm upset he didn't tell me where he was going and it made me think he planned it. He said he was fixing the heat and then she just showed up and started yelling at him about the past right away and then five minutes later he left and came home. I find that hard to buy. Maybe I need to be more understanding about it? I just can't help but be skeptical of all of it. He said he promises he wants to be with me and move forward with me and he loves me. But I'm still a little upset. What are your thoughts ladies? Sorry this is so long.